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MR556A1/HK416 extended picatinny handguard. The 11 inch rail allows for longer sight radius and more rail space. Rifles come factory standard with 9 inch picatinny rail.
| UPC | 642230247635 |
|---|---|
| Manufacturer | Heckler & Koch / H&K |
| Manufacturer Part Number | 50233617 |
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